Federal Communications Commission has not yet give approval to Apple for the release of iPad to the general Public. It seems that there were a few features in the iPad left out from FCC which are not in process of approval.
One thing is for sure that Mr. Steve Job sure knows how to keep a secret, even from FCC. Maybe he did not want them to know as it might have leaked out of FCC. Therefore, now the case is in process and we can all see iPad to see the daylight in about 2 to 3 month's time, which is our estimate.
By the way, in case you are wondering, you cannot even pre-order it. As indicated on Apple's site that there is no date on the availability of the device and all you can do is to add your email address to get notified when available.